As I rewrite some parts of code for color library I noticed silent assumption I made. Namely I assumed that all color components are the same type. But must it be this way? Does anyone use types like: struct rgb { float r; unsigned char b; signed char g; }; I think adding such a feature (enabling use of such components) will not be hard, but it will make code a littl longer (but as fast in execution) and harder to maintain. Also writing own component class would be a little bit longer (for those who use all components of the same type). However I plann to make ready implementations for common component models. I know thet soem types can be simulated by others. For example: struct rgb { usnigned int r : 16; unsigned int b : 8; unsigned int g : 8; }; all components have here the same type even if "r" and "g" could really use "unsigned char". But when there is difference signed/usnigned or integer/float nothing (as I think) can be done. So? Allow diffrent types or not? Adam Badura